The NI ‑ 9477 uses industrial logic levels and signals so it can be connected directly to a wide variety of industrial relays, solenoids, and motors. Each channel is compatible with signals from 5 V to 60 V and is isolated from the channel to ground. The channels of the NI ‑ 9477 can be connected in parallel and then draw up to 20 A of current per module (max. 1 A / channel).
 Product features:
-  Number of pure digital input channels: 0
-  Number of pure digital output channels: 32
-  Number of bidirectional digital channels: 0
-  Logic level of the digital I / O: 12 V 24 V 48 V.
-  Maximum update rate: 8 µs
-  Current flow direction: current sinking output
-  Isolation of the digital I / O: 60 VDC isolation of the channel from ground
-  Connection type front: D-Sub
-  Protective coating: no
-  With housing: yes
-  Supported hardware platform: CompactDAQ, CompactRIO